Fuse holding structure



July 28, 1964 H. M. FRIEDMAN FUSE HOLDING STRUCTURE Filed July 3'. 1961United States Patent O 3,142,738 FUSE HOLDING STRUCTURE Harry M.Friedman, Brooklyn, N.Y., assigner to Delta Metal Products Co.,Brooklyn, N.Y. Filed July 3, 1961, Ser. No. 121,467 4 Claims. (Cl.21110-133) This invention relates to holding fixture structures forexchangeable electric fuses, and particularly pertains to a ratherelongated structure for holding a plurality of fuses as compared withheretofore used broad and short fuse holding devices.

Fixtures for holding exchangeable multiple electric fuses are well knownin the art. However, due to the stringent requirements the heretoforeused fixtures are rather broad, clumsy and heavy, and in most cases thefuse holding clips are separated by wide dielectric partitions inaddition to the outer dieletcric walls enclosing all of thefusereceiving clips. As a result the heretofore used fixtures areunwieldy, difiicult to handle in narrow places, and require asubstantially broad area for mounting.

The present device, on the other hand, is designed to be substantiallylightweight, narrow and elongated so that its mounting in limitedconfinements is facilitated, since there is usually substantial roomlengthwise, whereas widthwise the space is limited.

Heretofore used fuse holding fixtures usually contain three adjacentpairs of fuse holding clips for use with wiring employing three lines.Such three-fuse fixtures are of a substantial width. Compared with thispresentday used wide construction, the instant device incorporates anarrow but elongated arrangement of fuse clips, as will be presentlyevident.

The prime object of this invention therefore is the provision of asubstantially narrow, elongated fuse holding fixture which is relativelyinexpensive and very simple in its structural arrangement, thusfacilitating ready mounting within limited confinement.

A further object of the present invention is the provision of a fuseholding fixture wherein at least two, four or six pairs offuse-receiving clips are employed, and wherein the arrangement of theclip holding pairs is such that one set of pairs is located at one endof the base, whereas the other pair is arranged at the other endthereof, the pairs of clips at one end of the base being staggered inrelation to the other pair of clips at the other end of the base.

An additional object of this invention is the provision of asubstantially narrow fuse-holding fixture composed of a monolithic,dielectric structure defining an elongated base portion from whichproject at least two pairs of spaced fuse-supporting elevations,constituting integral parts of said base portion, one pair of saidelevations being disposed at each end of the elongated base portion, thepairs of elevations being offset relative to each other, and whereineach of the elevations is provided with a recess having an end abutment,the recesses of said elevation serving for the accommodation offuse-holding clips, said end abutments of the recesses being adapted forlimiting the movement of said clips.

A further object of this invention is the provision of insulated busbars extending from what may be termed the inner fuse holding clips andthe arrangement of conductor attaching means at the ends of the busbars, which bar ends project beyond the end of the base opposite to thebase end supporting the clips, and wherein conductor attaching means areprovided at what may be termed the outer fuse clips and which conductorattaching means extend beyond the end of the base where the clips arelocated.

The foregoing and other advantages of the present invention will be morefully understood from the ensuing description of the accompanyingdrawings, wherein:

FIG. 1 is a top view of the present holding fixture structure;

FIG. 2 is a section taken approximately along lines 2 2 of FIG. 1; and

FIG. 3 is an end view seen from either end of FIG. 1.

As will be seen from the figures, there is employed an elongated, rathernarrow, one-piece base 10, from which extend integral elevations broadlyindicated at 11, arranged in spaced pairs at opposite ends of base 10.These elevations form spaced columns 12 and 13, see FIG. 2, of whichcolumns 12 are designated as inner columns and columns 13 as outercolumns. These columns are separated by a spare-out 14. In this spareoutis provided a double recess 15 for receiving attaching means for thebase.

The upper faces of columns 12 and 13 are recessed as at 12' and 13 sothat abutments 12" and 13 are formed. Recesses 12' and 13' serve asresting and attaching surfaces for inner and outer fuse clips 16 and 17,respectively, which are `aligned with one another. These fuse clips aredesigned to removably hold fuses 18.

With inner clips 16 there are associated bus bars 19 which are bentdownwardly and continued within insulating tubes 20 towards and extendbeyond the base end opposite that where elevations 11 are located. Atthe end of bus bars 19 there are provided conductor -attaching means20', and similar conductor attaching means 21 are associated with outerclips 17. Clips 16 and 17 are held in place by screws or other meansindicated at 22, the heads of which are sealed as shown at 23.

In observing FIG. 1 there will be seen two pairs of fuse receiving clipsat the right lower end of the base and a similar set of clip pairs atthe left-hand upper end of the base. Each clip pair is offset relativeto the other pair, and each pair of clips is spaced so that the bus bars19 can pass freely between them. About the ends of the insulated busbars there are provided insulating shields 24 which extend upwards andpartly beyond the fuse clips as clearly seen in FIG. 3. These shieldsalso include conductor attaching means 20 of the bus bars.

Referring now to FIG. 2, it will be noted that clips 16 and 17 not onlyare attached to their supporting surfaces 12 and 13', but they arelimited in their movement by abutments 12" and 15 so that the spacing ofthe clips is strictly defined and their movement restricted.

By consulting the drawings, especially FIGURE 2, it will be noted thatthe present fuse-holding fixture constitutes a monolithic structure,made of dielectric material yand comprises an elongated base portion 1t)from which extends upwardly a pair of integral elevations 12, 13, whichare spaced from each other by spare-out 14.

In the drawings a fuse holding fixture is shown having four pairs offuse clips. It is to be understood, however, that either only two pairsof oppositely disposed fuse clip pairs could be used, as well as sixsuch fuse clip pairs, depending upon given requirements, and while theforegoing description of the drawing deals with only one of thepresently preferred fonns of the instant invention, it is obvious thatduring the production and use of the device changes and improvements maybe required which are deemed to reside within the scope of the presentinvention, as defined in the annexed claims.

What is claimed as new is:

1. In a holding fixture structure for exchangeable electric fuses, anelongated, substantially narrow, elongated dielectric, monolithic basebody having at each end at least one spaced elevation integral with andprojecting upward from the base body, the elevation at one base endbeing offset in relation to the elevation at the other base end, saidelevations being spaced by a spare-out which separates the elevations toform inner and outer supporting columns, each supporting column having arecess and an end abutment, resilient fuse-receiving mountings supportedby and firmly secured to each of the columns, and restricted in theirmovement by said end abutments, the mountings supported by what may betermed the inner columns being designated as inner mountings, themountings supported by the outer columns being the outer mountings, themountings at each elevation being aligned, and an insulated bus barextending from each of the inner fuse receiving mountings toward andprojecting with their ends beyond the end of the base body opposite tothat where the elevations are located.

2. In a holding iixture structure as per claim 1, and wherein each ofthe outer mountings having conductor attaching means extending beyondthe base body, and similar conductor attaching means being associatedwith the projecting ends of the bus bars.

3. In a holding ixture structure as per claim 2, and wherein insulationshields are provided at bus bar endsv where said conductor attachingmeans are located, said shields extending partly beyond the outer fusemountings. Y 4. In a holding iixture structure for electric fuses, asubstantially narrow, elongated, one-piece monolithic and dielectricbase portion having at least one integral pair of elevation formed ateach end thereof, the pairs of elevations being staggered relative eachother, each of said pair of elevations comprising two upward projectionsspaced from each other by a spareout, one of the projections being aninner projection, the other an outer projection, recesses for receivingattaching means for the base extending from the spare-out toward thebottom face of the base portion, each of the upward projections havingaligned, recessed supporting areas with end abutments; resilient,aligned fuse clips resting against and being secured to said supportingareas and being limited in their movement by said end abutments, theclips secured to the inner projections being designated the inner clips,the clips secured to the outer projections being the outer clips,insulated bus bars secured to and extending from the inner fuse clipstoward and projecting beyond the ends of the base portion opposite tothose provided with said elevations, conductor attaching means providedat the projecting ends of the bus bars, other conductor attaching meanssecured to the outer fuse clips, said conductor attaching meansextending beyond the ends of the base portion, and insulating shieldsarranged about the conductor attaching means at the ends of the busbars.

References Cited in the file of this patent UNITED STATES PATENTS1,203,584 Cole Nov. 7, 1916 FOREIGN PATENTS 8,535 Great Britain lune 17,1909 65,645 Sweden Dec. 22, 1925

1. IN A HOLDING FIXTURE STRUCTURE FOR EXCHANGEABLE ELECTRIC FUSES, ANELONGATED, SUBSTANTIALLY NARROW, ELONGATED DIELECTRIC, MONOLITHIC BASEBODY HAVING AT EACH END AT LEAST ONE SPACED ELEVATION INTEGRAL WITH ANDPROJECTING UPWARD FROM THE BASE BODY, THE ELEVATION AT ONE BASE ENDBEING OFFSET IN RELATION TO THE ELEVATION AT THE OTHER BASE END, SAIDELEVATIONS BEING SPACED BY A SPARE-OUT WHICH SEPARATES THE ELEVATIONS TOFORM INNER AND OUTER SUPPORTING COLUMNS, EACH SUPPORTING COLUMN HAVING ARECESS AND AN END ABUTMENT, RESILIENT FUSE-RECEIVING MOUNTINGS SUPPORTEDBY AND FIRMLY SECURED TO EACH OF THE COLUMNS, AND RESTRICTED IN THEIRMOVEMENT BY SAID END ABUTMENTS, THE MOUNTINGS SUPPORTED BY WHAT MAY BETERMED THE INNER COLUMNS BEING DESIGNATED AS INNER MOUNTINGS, THEMOUNTINGS SUPPORTED BY THE OUTER COLUMNS BEING THE OUTER MOUNTINGS, THEMOUNTINGS AT EACH ELEVATION BEING ALIGNED, AND AN INSULATED BUS BAREXTENDING FROM EACH OF THE INNER FUSE RECEIVING MOUNTINGS TOWARD ANDPROJECTING WITH THEIR ENDS BEYOND THE END OF THE BASE BODY OPPOSITE TOTHAT WHERE THE ELEVATIONS ARE LOCATED.